Combination coal and gas range.



Patented Sept. 19,1916.

2 SHEETS-SHEET] 4,; Mme,

H. C. DIETRICH.

COMBINATION COAL AND GAS RANGE.

APPLICATION FILED MAY I2. I916.

H. c. DIETRICH.

COMBINATION COAL AND GAS RANGE.

APPLICATION FILED MAY I2, I916. I 1 1 98 '70? Patented Sept. 19, 1916.

2 SHEETS-SHEET 2.

I UNITED STATES PATENT OFFICE.

HENRY C. DIETRICH, 0F EVANSVILLE, INDIANA, ASSIGNOR TO CRESCENT STOVE WORKS, OF EVANSVILLE, INDIANA, A CORPORATION OF INDIANA.

Specification of Letters Patent.

Patented Sept. 19, 191

Application filed May 12, 1916. Serial No. 97,123.

desirable to seal the oven when coal is used as the heating medium, so that the products of combustion and gases will heat the oven by passage therearound and heat radiation therethrough without having admission to the interior of the oven. On the other hand, when gas is used as the heating medium, the heat may be directly conveyed to the interior thereof without contaminating anything within the oven, if free circulationor take-ofi' of the heated air is provided.

In any gas range it is a desideratum to distribute the heat from the gas burners into different portions of the oven to heat all portions thereof alike, or substantially so.

A further desirable object in either a gas range or combination coal and gas range is to minimize the number of valves, dampers, pull rods, etc., which have to be operated to bring about the desired controls and heating effects so as to prevent error in operating the range.

My invention seeks to provide improvements adaptable for use in either a gas range orJa combination coal and gas range which will accomplish the foregoing objects. K

As the invention is, in certain aspects, as well adapted for use in a gas range as in a combination coal and gas range, I do not limit its application to a range of either kind, unless specified in the claims.

One object of the invention is to provide, in either a gas range or combination coal and gas range, gas burners whose perfora-- tions or flame projecting means are arranged m a novel manner in relation to are simultaneously open heat admission openings or ports entering the oven; further, to provide an improved damper, ports to admit heat to different parts of the oven, and a compartment and gas burner arranged so that heat from the burner will be delivered to both of the ports and thus enter the oven at different points, or, the ports may be completely-closed.

A still further object is to-combine a damper or dampers and burner or burners such as set forth, in connectionwith an oven which is also adapted for beingheated from a coal or fuel fire-box, whereby the dampers may be closed to seal the oven when co 1 is used as the fuel, or, said dampers opene to directly admit heat to the oven from gas burners when ing medium.

Another object is the provision of numerous gas burners, a damper for controlling the admission of the heat from the burner or burners to the oven, a take-off or exit gas is employed as the heat-' by, admission of heat from a gas burner" thereto, the take-ofl' damper will be opened to afford free circulation through the oven.

In that connection, I preferably provide means operable from the valve which controls the supply of gas to the gas burner, which is adapted to open said admission and take-off dampers to an extent corre sponding to the extent or'degree of opening of the said gas valve, thereby minimizing the number of parts for the accomplishment of these purposes and providing an automatic damper control from the gas admission valve. If a plurality of burners be employed, for supplying heat to opposite sides of the oven, and a plurality of dampers used in connection with the respective burners for either sealing the oven or opening communication between different parts thereof with the gas burners, I prefer to couple the admission dam ers so that they or closed by a In addition thereto, the take-ofi damper for the exit ofthe heat from the oven, 1s preferably coupled to the aforesaid operating means so that a plurality of burners, their dampers, and the takeoff or exit damper are all simultaneously operated from a single gas controlling valve. I wish it understood, however, that my invention is not limited to, the joint operation of the admission dampers, if two or more be used, nor to the use of a single gas admission valve for both gas burners, nor to the control of the take-off damper simultaneously with the control of one or more gas burners and admission dampers, except where so specified in the claims.-

I have shown and described herein an improved coupling or operative connection whereby a plurality of admission dampers and take-off damper may be simultaneously opened and closed from a single gas admission valve, but such operative connection forms the subject matter of another application. 1

Being aware that changes may be resorted to in carrying out my invention, the dis--- closures herein given are to be considered as illustrative, rather than restrictive of the scope of the invention.

In the accompanying drawings: Figure 1 v is a' front perspective of a combination coal and gas range having my improvements, certain partsv being removed and others broken away; Fig. 2, a vertical section; Fig. 3, a side elevation; Fig. 4, a rear elevation;

and Fig. 5, a detail view, partly in section, of the valve and adjacent parts and its op-.

erative connection to the rocker shaft.

Only so much of the combination coal and gas range is shown as will give a clear idea of how' my improvements are applied thereto. The fire-box is shown at 1, the oven at 2, the usual flue around the oven at ,3 by

which the products of combustion from the fire-box heat the oven without having access thereto, and the take-off flue at 4.

The oven 2 is provided with casings, chambers, or compartments 5 on opposite sides thereof, the one at the left, Fig. 2, being supplied with air in any desired manner as,

,rear and they are in communication with the lower ortion and the central or upper portion 0 the oven by slots 9 and 10.

Contained Within the chambers or compartments 5 are gas burners 11 and 12 which are provided with flame discharging slots partition 15 extends from the oven wallinto each compartment 5 and against the burner, subdividing the compartments or casings 5 so that heat from the openings or slots 13 is directed into the lower portion of the oven and heat from the openings or slots 14 passes upwardly and enters the oven through the ports or slots 10. The same burner, therefore, serves the purpose of a double burner and provides forheat in different portions of the oven.

\Vhen coal is used, instead of gas, the oven should be sealed so that the products of combustion and'gases thereof cannot have access to the interior of the oven. I, therefore, provide angular or L-shaped dampers 16 and 17 which are rockably mounted in any suitable manner at 18. Thus, portions of the dampers which operate in the oven, can either be swung inwardly to permit the heat from the burners 11 and 12 to enter through the slots 9 and 10, or, when it is desired to seal the oven to retain the heat therein or to use coal as a fuel, the dampers are closed, as shown by dotted lines. They then abut the stop ledges 19 and 20.

\Vhile it is desirable to use burners and dampers at both sides of the oven, I am aware that only one burner and one damper might be employed.

At the rear of the oven are exit openings 21 for the outward passage of heat so that there will be a free circulation through the oven. A sliding rear damper plate 22, Fig. 4, opens or closes the ports 21 according to whether the dampers 16 and 17 are open or closed. The means employed for opening the damper 22 will form the subject of a separate application. The joint control of the dampers 16 and 17, preferably by the valve which controls the admission of gas to the burners 11 and 12, is anotherfeature of my invention, independent of the operation of the damper 22 simultaneously therewith.

At the rear of the range is a sliding bar 24 which has slots 25 into which project studs or screws 26. The damper 22 is connected to the sliding bar 24. The rear portions of the pivots or axles' 18 of the dampers 16 and 17 are loosely received in elongated slots 27 in the bar 24 and-they are provided with crank arms 28 which have rounded ends 29. Projecting from the rear face of the bar 24 are sets of lugs 30, 31, which are elongated, rounded, oval, or elliptical in cross section, and they cooperate with the cranks 28 and 29 in'such manner that when the bar 24 is shifted, the cranks 28 and 29 are turned, and thus the dampers 16 and 17 are opened or closed. At the side of the range is a rock shaft 32 which is suitably mounted in brackets 33 and carries a bifurcated rocker. 34 which straddles a pin or stud 35 on the bar 24. The valve 23 which controls the admission of gas from the supply pipe 36 to the burners 11 and 12, there being a branch pipe 37 for burner 11, is adapted to turn the shaft 32 when admitting or cutting off the supply, of gas to thesaid burners. The arrangement and connections may be those shown in Fig. 5. The valve extends through the casing 23 and has a square socket 32' which detachably receives the squared end 32" of shaft 32. The air inlet or mixer is shown at 23". When the valve 23 is opened, the shafts or axles 18 are turned to simultaneously open the dampers 16, 17 and 22 and when the valve is. closed, the said dampers are all closed. Consequently, the extent to which the valve 23 is opened will determine the extent of opening of the dampers and the volume of heat and circulation through the oven is thus regulable at will so that any desired heating effect may be ob-' tained when the burners l1 and 12 are lighted. If the oven has been heated by said burners and it is desired to retain the heat therein, the closing of valve 23 seals the oven by the closing of the dampers 16, 17 and 22. If it is desired to heat the oven by coal, the valve 23 being closed, the oven is sealed and the products of combustion from the fire-box cannot enter the oven.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is:

1. In a.range, the combination with an oven, of a casing or'chamber having different ports in communication with" the oven at different points thereof a burner in said casing or chamber, and a duplex damper one part of which operates in the casing or chamber and the other part in the oven, said damper being adapted to completely close or fully open said ports and being settable to any desired intermediate position.

2. In a range, the combination with an oven, of a casing having independent openings or ports communicating with different parts of the oven, a burner having'diflerent sets of flame openings adapted to direct the flames so that the heat therefrom .will be adapted to travel toward the respective ports aforesaid, and a duplex damper adapted to open or close both of said port, which is settable to anv desired open position.

3. In a range, the combination with an oven, of a casing having independent openings or ports communicating with different parts of the oven, a burner having different sets of flame openings adapted to direct the flames so that the heat from the respective sets of openings will be adapted to travel toward the respective ports aforesaid, a partition extending from a wa l of the casing to the burner to subdivide the casing into different compartments for the flow therethrough, to the respective ports, of the heat from the different openings of said burner, and a duplex damper adapted to open or close both of said ports, which is settable to any desired position. I

4. In a range, the combination with an oven, of a casing, a burner in said casing, said burner being adapted to direct heat to different parts of the casing, said casing having independent port's communicating with different parts of the oven through which the different streams of heat from the burner-are adapted to flow, a duplex dampercontrolling the flow from the casing to' the oven through the respective ports, and a gas valve controlling the flow of gas to the burner and adapted to open the damper when the gas is turned on and to close it when the gas is shut off, said damper simultaneously opening, or simultaneously closing said ports.

5. In a range, the combination with an oven, of a casing, a burner in said casing,

said burner being adapted to direct heat to.

different parts of the casing, said cas ing having. independent ports communicating with different parts of the oven through which the different streams of heat from the burner arev adapted to flow, a damper having one part operating in the casing and another part operating in the oven, the re spective parts of the damper being adapted to simultaneously control flow through the casing and also from the casing to the oven, and a gasvalve controlling the admission of gas to said burner and having an operative connection to said damper, whereby both parts of the damper are opened when.

the valve is opened and closed when the latter is closed.

6. In a combination coal and gas range, the combination with a fire pot, of an oven, a take-off flue, a heating flue through which the heat may travel from the fire-pot to the take-off flue, a gas burner casing sealed from the aforesaid flues and in communication with the oven, a gas burner in said casing, a gas valve for said burner, a damper controlling the admission of heat from the burner to the oven, adamper controlling the exit of heat from the oven to said take-off flue, and a common or joint operative connection between the gas valve and both of said dampers, whereby both dampers are opened or closed as the gas valve is opened or closed.

7. In a combination coal and gas range, the combination with a fire pot, of an oven, a take-ofl flue, a heating flue through which the heat may travel from the fire-pot to the take-off flue, a gas burner casing sealed from the aforesai fines and in communicatake-01f damper, and an articulated connection between the rock shaft and the sliding bar. 10

In testimony whereof, I hereunto affix my signature.

HENRY- C. DIETRICH. 

